Thanks for your comments.
The kitchen is bespoke in that the cabinets are slightly shorter than normal.
The issue arises from one side they’ve built to 580mm high, the other side they built to the same size but they incorrectly measured the extractor which has made the overall height 584mm – but the doors and end panels for both sides are 580mm.
Plus the carcasses were provided first and the doors about a week later (rather than the next day as promised which is the delivery issue) When he fixed them up it was all good, but when the extractor was fitted and then the doors it was when he noticed the issue. The guy who fitted it is a bespoke kitchen fitter and came highly recommended – his work was amazing and the attention to detail really shows – but unfortunately this pigs ear isn’t going to be a silk purse.